diff --git a/python/paddle/fluid/optimizer.py b/python/paddle/fluid/optimizer.py
index fbd04f1eb461268ae98ca74c0bc46cc2717733cb..fe2b3fbbd91f24881341003ad78af06e33772fd4 100644
--- a/python/paddle/fluid/optimizer.py
+++ b/python/paddle/fluid/optimizer.py
@@ -1368,9 +1368,9 @@ class FtrlOptimizer(Optimizer):
 
     Args:
         learning_rate (float|Variable): global learning rate.
-        l1 (float):
-        l2 (float):
-        lr_power (float):
+        l1 (float): L1 regularization strength.
+        l2 (float): L2 regularization strength.
+        lr_power (float): Learning Rate Power.
         regularization: A Regularizer, such as
                         fluid.regularizer.L2DecayRegularizer.
         name: A optional name prefix.